For me 2.1.2 performance seems to be pretty much identical in terms of audio. (If it goes to 99% processor while it over-buffers stuff, but it glitches less, that's good by me. I don't mind if the processor's running like a f***ed clock, the GUI looks like a frozen Spectrum game and the S4 starts melting, as long as the punters are none the wiser.) The tap function seems to override the default 300 now, whereas it didn't reliably before, I think. However Traktor still can't handle me scrolling through a playlist without the audio glitching, which is pretty unacceptable. It is odd - sometimes I can scroll at immense speeds fine, but I'll then scroll slowly and it'll cause the audio to freeze. For me this is far and away the biggest issue - if I play live I use MediaMonkey in place of the browser, although it is an absolute nightmare and hardly making the most of my S4..hoping it is fixed SOOOOOON!